求购铝390

本公司采购美国牌号铝390,具体参数要求如下: Al: 74.4%~79.6% Cu: 4%~5% Mn: max 0.1% Si: 16%~18% Ti: max0.2% Fe:max1.3% Zn: max0.1% Mg: 0.45~0.65% other each: max0.1% other total: 0.2